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Optical pyrometer and technique for temperature measurement

US 4,222,663 A · Assignee: United Technologies Corporation · Inventors: Gebhart; John R. et al.

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1 drawing sheet

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed August 1, 1977 and granted September 16, 1980. A patent filed before June 8, 1995 lasts 17 years from grant or 20 from filing, whichever is longer, so its term ended September 16, 1997.
  • Any extension is capped at five years, so it can't still be in force.
  • We haven't checked its US family, and a later related patent could still be in force. We check US rights only.
FiledAugust 1, 1977
GrantedSeptember 16, 1980
Term endedSeptember 16, 1997
Application number05/820658
Classification (CPC)G01J5/08 +2 more
Length5 pages

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

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